I have a similar problem. I'm using Miruku 15122011, and the client (almost) applicable to that date (I thought it'd be more compatible), 2011-12-14cRagexeRE.exe, from the same place as dude123, http://supportmii.com/ro1/Clients/. I used ShinsDiffPatcher and WeeDiffGen to modify it.
I tried using OpenSetup, like you said, just gives the same problem - a constant loop. Any idea why this might be? =
Thanks.